is.downset {parsec}

is.downset

Description

The function checks whether the input set of poset elements Q is a downset of the poset represented by the incidence matrix z.

Usage

is.downset(z, Q = 1)

Arguments

z

incidence matrix

Q

vector identifying the input set of profiles.

Examples

z <- getzeta(var2prof(varlen = c(2, 2, 2)))

plot(z, col = 1 + c(1, 1, 0, 0, 1, 0, 0, 0) + c(0, 0, 0, 2, 0, 0, 2, 2), lwd = 2)

Q <- c(4, 7, 8)
rownames(z)[Q]
is.downset(z, Q)

Q <- c("211", "112", "111")
is.downset(z, Q)